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Questions tagged [inorganic-chemistry]

Inorganic compounds generally do not have C-H bonds, while organic compounds do have such bonds. The distinction between inorganic and organic chemistry, however, is far from absolute.

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Why is gunpowder urinated on in Blood Meridian?

An interesting section of Blood Meridian (1985) by Cormac McCarthy has the gang of "Indian fighters" surrounded and out of powder, so one of them manages to make it from scratch, making charcoal from ...
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Help understanding the pi-properties of the NCS- ligand

Course knowledge When considering the NCS- ion, I take all atoms to be sp hybridized. This means that there are 8 electrons that are accommodated in the $\pi$-system. There are two orthogonal 3-...
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Considering the d-d transition how, does tetracyanidonickelate(II) ion exist as a colored complex?

As I refer on google, the resources indicated that, the d block elements which have unpaired electrons as in their ions, when they are making complexes with ligands, they can absorb different ...
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804 views

Does the wavelength of light absorbed by a complex depend upon extent of splitting or stability?

Background: we were doing Crystal Field Theory in school when this question popped up. Specifically we were talking about stability obtained due to the chelate effect and if the extra stability in a ...
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236 views

What's the hybridization in diphosphorus molecule?

I read that diphosphorus has 2 phosphorus atoms joined by a triple bond (ie) it has one sigma bond and 2 pi bonds with 2 lone pairs ( 1 lone pair on each atom). I'm confused about the hybridization of ...
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Which reagents can directly oxidize ammonium ion into gaseous dinitrogen?

I have a simple question. I've looked on the internet and the only thing I found was the Anammox process - Anaerobic Ammonium Oxidation. Wikipedia lists the reaction as: $$\ce{NH4+} +\ce{NO2-}\...
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103 views

Sense of radii quotient to determine coordination number in crystals?

Every common textbook explains the method of the radii quotient between the cation and anion of a selected salt to determine to coordination number(s) in that salt. For example deduce "Inorganic ...
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78 views

Can someone help me finish this reaction?

This question revolves around sodium percarbonate (https://en.m.wikipedia.org/wiki/Sodium_percarbonate) and its reaction with sulfuric acid. I didn't find anything, so I tried assembling it myself. ...
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74 views

Briggs-Rauscher numerical model

I want to use the Briggs-Rauscher experiment to demonstrate oscillating reactions, and then explain it using a numerical model. How much is known about this reaction? Is it possible to write down a ...
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87 views

What will happen if ligand orientation is changed?

How we came to know ligand should approach from t2g orbitals in d5 configuration for tetrahedral complexes? What will be the difference in energy if ligand approach from eg? As far as I can think, ...
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868 views

Can the decompistion of one carbonate inhibt the decomposition of another carbonate?

If two different carbonates of Group II, are mixed in equal amounts and then heated could one of the carbonates decomposition inhibt the other ones decomposition? I don't understand how it would ...
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Trends in pi backbonding for main group elements across a period

Recently, I have been re-reading some undergraduate notes and found that there's a period trend in pi backbonding of main group elements (i.e. no transition metals involved) but no explanation were ...
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Can two solids form in a double displacement reaction?

I am trying to react silver flouride with magnesium chloride. I know it is a double displacement reaction but so far the equation I have gotten is: $$\ce{2AgF (aq) + MgCl2 (aq) -> MgF2 (s) + 2AgCl ...
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Shape of nickel tetracarbonyl

Is nickel tetracarbonyl a square planar complex or a tetrahedral complex? According to the crystal field theory, $\ce{CO}$ is a strong field ligand and should hence cause the $t_{2g}$ electrons of ...
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170 views

Can pure elements have different colors?

This question was inspired by this: Are there colorful metals besides gold and copper? I was wondering how the color of a pure element could be changed. I know that it is possible for color to change ...
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How to compare the oxidizing power of perhalate ions

In my book the oxidizing power in descending order of the following is given as: $\ce{BrO4-} > \ce{IO4-} > \ce{ClO4-}$ My doubt is regarding their order of oxidizing tendency. I thought that ...
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Bond angle order of SF2, OF2, HOF

Arrange the following componds in the increasing order of bond angle. $$\ce{HOF,~OF2,~SF2}$$ I know that bond angle of $\ce{SF2}$ will be less than the bond angle of $\ce{OF2}$ because of larger ...
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748 views

What is the hybridisation state of the sulfur atom in S4N4F4?

The molecule is shown in the textbook as: I can rationalise that the N is sp2 hybridised with a single electron in the p-orbital perpendicular to the plane of the S/N ring. (The sp2 lone pair is ...
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2k views

Theoretical temperature change in lime hydration

Calcium oxide (quicklime) and water have an exothermic reaction $\ce{CaO + H2O \rightarrow Ca(OH)_2} \quad \quad \Delta H^{\circ}_f=-65.3 \; \mathrm{kJ \cdot mol^{-1}}$ Assume that I have 1 kg of ...
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Comparing two oxidizing agents using electron configuration

Which oxidizing agent from the pair $\ce{K_2IrCl_6/K_2PtCl_6}$ is stronger? Explain your answer using their electron configurations. We write the electron configurations for $\ce{Ir/Ir^{4+}}$ and $\...
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228 views

What are the chemical similarities between gallium and barium?

I am analyzing nutrient concentrations in wood, and I have found that in all my samples the distribution of gallium and barium are closely related. As a related phenomenon, the presence of these ...
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759 views

What happens when two nitrates react with each other?

I have to determine the products of the ammonium nitrate and copper nitrate. Is the below reaction correct? $$\ce{NH4NO3 + Cu(NO3)2 -> Cu(NH3)4(NO3)2}$$ (ammonium nitrate + copper nitrate → ...
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2k views

Ratio of rate of diffusion of two gases under constant temperature and pressure

I'm consulting one of higher classes books to study chemistry. I had been studying Graham's Law and question related to rate of diffusion. I came across a question[1] which says: Calculate the ...
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109 views

Grease & Thermal resistant cardboard for the foods industry?

I am on the lookout for, preferably, a cardboard (ish), that is both heat & grease resistant, for usage in microwave popcorn. As such, the material must be appropriate for direct contact with food....
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2k views

Titanium in HF vs HCl

So we tried the reaction between Titanium metal with hydrochloric acid and hydrofluoric acid at a similar concentration. While boiling temperatures and constant heat over a long period of time are ...
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3k views

What are examples of group 14 elements forming dπ - pπ bonding?

While studying the Group 14 elements, I came across the anomalous behaviour of carbon. In that there was a point: Carbon forms only p$\pi$-p$\pi$ type bonding while other elements in the group form ...
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diborane fragment orbitals energy of dihydrogen

I want to ask a question about the fragment orbitals of the $\ce{B2H6}$ system, specifically when I combine the $\ce{B2H4}$ with the $\ce{H2}$ fragments. I am halfway through my inorganic chemistry ...
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Why my boiling pot turned black?

Recently I ran out of dish washing detergent, so I decided to pick up one of the recipes online, to make my own "ecological" dish washing detergent alternative. The recipe was: Mix ingredients: ...
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Are Slater’s rule and lanthanide contraction contradictory?

According to most textbook and the Wikipedia page of lanthanide contraction, the phenomenon is due to poor shielding of nuclear charge by 4f electrons. However, the σ value of 4f electrons to 6s is 1....
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Why doesn't the Pilling-Bedworth ratio of silicon cause issues in silicon technology?

According to Wikipedia, silicon has a Pilling-Bedworth ratio of 2.15. In theory this should mean an SiO2 film on silicon should have a fairly large amount of compressive stress and high probability of ...
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48 views

Bond lengths in P₄O₁₀

According to JD Lee's Concise Inorganic Chemistry: The double bond $\ce{P=O}$ in $\ce{P4O10}$ contains p(π)–d(π) backbonding, where a full p-orbital on oxygen overlaps with an empty d-orbital on $\...
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Is black phosphorous aromatic?

I know that graphite and boron nitride are aromatic in nature. In a similar way, can black phosphorous too exhibit aromaticity? Since it is essentially the same having 6 membered rings with lone ...
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What is reason of stability of metal (Sr and Ba) peroxides?

While studying inorganic chemistry I came across the following chemical equation. $$\ce{M + Air\left(1/2O2 + N2\right) ->[Δ] MO ->[\text{Excess}~O2] MO2 (Stable) + M3N2}$$ $$\ce{M} = \ce{Sr, ...
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Can the Lewis dot structure of SO2 be experimentally verified?

I have just watched 2 different videos on the Lewis dot structure of sulfur dioxide, $\ce{SO2}$. One says it is $$\ce{O=S=O}$$ and the other says $$\ce{^-O-S^+=O <-> O=S^+-O-}$$ The first ...
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315 views

What is symmetry of p- and d-orbitals in ${D_{3h}}$?

To identify IR and Raman active, symmetry of p- and d-orbitals are used. If we start since making ${D_{3h}}$ character table, how to match between symmetry of p- and d-orbitals and Mulliken symbol? ...
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70 views

Why does standard reduction potential get multiplied by the change in oxidation state and not by the number of electrons transferred?

The whole basis of Frost diagrams is to have a graphical representation of the Gibbs free energy of formation ($\Delta{G}_{f}$) of different oxidation states of an element using the proportional ...
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152 views

H-N-H bond angle in ammonia boron trifluoride adduct

In the reaction: $\ce{NH3 + BF3 -> NH3-BF3}$ does the HNH bond angle increase or decrease? Surely, the FBF bond angle decreases because boron changes from $\ce{sp^2 -> sp^3}$. But how can we ...
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Inorganic IUPAC for Compounds with bridged ligands?

Can we use bis(tetraammine) instead of octaammine is the 2nd example ? As in the 1st example they used bis(pentaammine) and also in the 3 one the used bis(carbonylcyclopentadienyliron)
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Mechanism of sodium hypochlorite and hydrochloric acid

The overall reaction for the reaction between NaClO and HCl is: $\ce{NaClO + 2HCl -> NaCl + Cl2 + H2O}$ To try and understand how this reaction occurs, I've thought of a simple mechanism for it. ...
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Why AlCl3 more acidic than FeBr3?

In compounds with lone pairs or with charge it is easy to predict acidity of compounds but how to describe acidic nature of such ($\ce{FeBr3}$, $\ce{AlCl3}$) transition element compounds ?
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Explaining the colour change in the potassium permanganate titration of iron(II) ions

In the redox titration: $$\ce{MnO4- + 8 H+ + 5 Fe^2+ -> Mn^2+ + 4 H2O + 5 Fe^3+}$$ the colour change which occurs is purple to colourless, because of the decreased concentration of permanganate ...
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Why does the order of adsorption of hydrated alkali metals on an ion exchange resin decrease down the group?

Why does the order of adsorption of hydrated alkali metals on an ion exchange resin decrease down the group? I recently did a question on this topic and they say adsorption order is $$\ce{ Li+ > ...
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915 views

Comparison between Boron Nitride and Graphite: Interlayer distance

Boron-nitrogen chemistry has attracted significant attention, partly because a B–N unit is isoelectronic with C–C. Furthermore, the radius of carbon and its electronegativity are roughly the average ...
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978 views

Why is the N-N bond length greater in dinitrogen trioxide than in dinitrogen tetroxide?

Why is the N-N bond length greater in dinitrogen trioxide than in dinitrogen tetroxide? If the lone pair on $\ce{N}$ in $\ce{N2O3}$ delocalises, then the $\ce{N-N}$ bond will have a double bond ...
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987 views

Acidity comparison of charged group 16 hydrides

March's Organic Chemistry (7th ed - page 337 under "Periodic Table Correlations" in chapter "Acids and Bases") states that: $\ce{H3O+ > H3S+ > H3Se+}$ is the acidity order of these charged ...
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327 views

Do molecules like NH2 cation exist?

I saw that the book said that nitrogen cations must have four bonds and no lone pairs. I wasn't sure why you couldn't have a lone pair and 2 bonds.
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1k views

Is it a “Bary center” or a “Bari center”?

(Studying Coordination Chemistry, "Crystal Field Theory" at school) Apparently, different sources spell this differently. The Wikipedia article on Crystal Field Stabilization Energy, calls it the "...
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51 views

Removing Tungsten Trioxide from Tungsten Electrode

I need a very sharp tungsten electrode, and I think radial electrochemical etching with sodium hydroxide is the way to go. The problem therein (I think) is that the etching will cause an oxide layer ...
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232 views

Why is nitrogen dioxide brown?

Nitrogen dioxide (NO2) is a reddish brown molecule, while its dimer nitrogen tetroxide (N2O4) is colorless. Can you give a reasonably detailed explanation for this from electronic structure theory? ...
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273 views

Unexpected behavior during preparation of copper hypophosphite

I am using copper hypophosphite for the activation of through holes in printed circuit boards. The circuit board is dipped into activator solution and upon heating, metallic copper is deposited in the ...